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Burka [1]
3 years ago
10

Factor completely 2x3 + x2 - 18x - 9

Mathematics
2 answers:
melisa1 [442]3 years ago
7 0
Factor the following:
2 x^3 + x^2 - 18 x - 9

Factor terms by grouping. 2 x^3 + x^2 - 18 x - 9 = (2 x^3 + x^2) + (-18 x - 9) = x^2 (2 x + 1) - 9 (2 x + 1):
x^2 (2 x + 1) - 9 (2 x + 1)

Factor 2 x + 1 from x^2 (2 x + 1) - 9 (2 x + 1):
(2 x + 1) (x^2 - 9)

x^2 - 9 = x^2 - 3^2:
(2 x + 1) (x^2 - 3^2)

Factor the difference of two squares. x^2 - 3^2 = (x - 3) (x + 3):

Answer:  (x - 3) (x + 3) (2 x + 1) thus the Answer is C.
Contact [7]3 years ago
4 0

Answer:

(x - 3) (x + 3) (2 x + 1) thus the Answer is C.

Step-by-step explanation:

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2 years ago
Brainliest <br> Please do one of the above<br> (I would appreciate if you did more then one)
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Answer:

a) 52.5 ft. b)40.1ft c)12.5ft d) 72.6

Step-by-step explanation:

a) The height of the lighthouse is 84ft, and the angle of elevation is 58 degrees.

tan58=84/x

find x by dividing 84 by tan58, and you get 52.5ft.

b) do the same thing, except 131 is in the base of the right triangle shape. That being said, do tan17=x/131.

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c) This question wants you to find the length of the slide, (basically the hypotenuse).

given the angle to be 46, do sin46=9/x

since sin is opp/hyp

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5 0
2 years ago
Read 2 more answers
To solve the equation 2(x - 1) = 8, you use the_______ to rewrite 2(x - 1) as 2x - 2.
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6 0
3 years ago
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The end of a hose was resting on the ground, pointing up an angle. Sal measured the path of the water coming out of the hose and
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Functions can be used to model real life situations.

The hose is 3.2 feet above the ground, at a horizontal distance of 4 fee

The function is given as:

f(x) =-0.3x^2 + 2x

At a horizontal distance of 4 feet, the value of x is 4

i.e. x = 4

Substitute 4 for x in f(x).

So, we have:

f(4) =-0.3(4)^2 + 2(4)

Evaluate the exponent

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Open both brackets

f(4) =-4.8 + 8

Add -4.8 and 8

f(4) =3.2

Hence, the hose is 3.2 feet above the ground

Read more about functions at:

brainly.com/question/10837575

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2 years ago
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